Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
CGI Home Additions & ADU: The Sacramento Owner’s Guide
A full CGI home addition or ADU in Sacramento runs $45,000 – $130,000 installed, depending on square footage, foundation type, and whether you’re building out or up. We match the structural and finish work to your CGI components, and most jobs move from signed scope to permit-ready drawings within two to three weeks. Homeowners usually find this page when the part that failed isn’t a bracket or a hinge, it’s the plan itself: a permit kicked back, a foundation estimate that doubled, or an unfinished room that’s been sitting exposed through one Sacramento rainy season too many.
Which CGI Models This Applies To
CGI home addition and ADU work covers two distinct scenarios for Sacramento homeowners. The first is a straight room addition, usually 200 to 600 square feet, tied into your existing roofline and HVAC. The second is a detached or garage-conversion ADU, which brings its own foundation, electrical panel, and sewer line requirements. The compatibility question isn’t about a model number here, it’s about how the new structure ties into your existing home’s framing, and that’s where we see the most expensive mistakes happen.
If you have original CGI drawings, even partial ones, bring them to the first walkthrough. They tell us the joist spacing, the roof pitch, and whether the original plate line was built to carry another story, which determines whether your addition is a $55,000 project or a $120,000 one. We also work with KraftMaid, Cambria, and Silestone when the addition includes a kitchenette or bath, because the finish package is where the budget moves fastest in Sacramento’s material market.
Styles & brands we work with
Signs Your CGI Home Additions & ADU Is Failing
- Doors that bind at the top corner. When the slab or foundation settles unevenly, the opening goes out of square. It’s not the door, it’s the ground under it, and the fix starts with a level check, not a new door slab.
- Soffit rot along the tie-in line. The seam where the addition roof meets the original roof is the first place water gets in. Sacramento’s freeze-thaw cycles and seasonal rain make this the number one failure point we see.
- Cracks wider than a quarter in the stucco or drywall. Hairline cracks are normal for any new build as it dries out. A crack you can fit a quarter into means the structure is moving more than it should.
- A utility bill that’s 30% higher than the year before. Poorly run ductwork or missing insulation in the addition pulls conditioned air out of the whole house. We trace it with a smoke test, not guesswork.
- The addition never got a final inspection sticker. If that’s you, the project isn’t done. Unpermitted square footage is a problem when you sell, when you refinance, or when your insurer asks questions after a claim.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
Here’s how Sacramento pricing breaks out on the work, drawn from the ranges above and the actual scope on site:
- Home Addition: $45,000 – $130,000, driven by square footage, foundation condition, and whether you need a second-story steel beam or a simple tie-in.
- ADU Construction: $90,000 – $220,000 for a detached unit with separate utilities; the panel upgrade and sewer lateral often move the number more than the framing does.
- Garage Conversion: $30,000 – $80,000 for an attached conversion that’s already under the main roof; ceiling height and slab condition are the swing factors.
Every line comes with a written price before we start, and it doesn’t move at the door. The quote includes permits, drawings, labor, materials, and disposal. If something hidden changes the number mid-job, we explain it in writing and get your sign-off before the work happens. That’s The Garrison Standard, and it’s been the rule here since 2004.
DIY or Call Us?
Owner work here is small scope. You can check your existing foundation vents, clear the gutters along the tie-in line, and mark where the crack is today so you can track if it’s growing. That’s genuinely useful information when we show up. But the structure itself, the roof cuts, the electrical feed, and anything touching gas or sewer, is not owner-level work. We’ve corrected more addition failures than we’ve built from scratch, and the repair always costs more than doing it right the first time. If you know the addition needs attention, call (279) 226-1509 and we’ll put eyes on it.
FAQs
A properly permitted and constructed addition in Sacramento should last 50 to 80 years for the structure, with the roof and the mechanicals replaced on their own shorter cycles. We warranty every project with the 365-Day Done Right Promise, but the annual check on the tie-in seam is the cheapest insurance you’ll ever buy.
Yes, and we do more of this than new construction. The addressable work is typically the roof tie-in, the stucco, the flashing, or the foundation. We’ll tell you straight if the structure underneath doesn’t justify the repair, and we’ll show you the price in writing either way. Call (279) 226-1509 and we’ll walk it together.
Plan on four to seven months for a standard addition once permits are issued, and six to twelve months for a detached ADU. Sacramento’s permitting office runs on its own clock, and we’ll tell you the honest timeline before we touch the wall.
Yes. Bradford Remodeling Co Sacramento pulls every permit and schedules every inspection as part of the written price. You don’t chase the city, and you don’t sit on hold. That’s part of The Garrison Code, and it’s been part of every job we’ve run since Curtis Lane started this company. Call (279) 226-1509 for a free estimate.
Written by Curtis Lane, Owner, Bradford Remodeling Co Sacramento at Bradford Remodeling Co Sacramento, serving Sacramento and nearby areas.
